Item type |
学術雑誌論文 / Journal Article(1) |
公開日 |
2023-06-19 |
タイトル |
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タイトル |
Interannual variability of surface bio-optical characteristics in the frontal zones of the Indian sector of the Southern Ocean during austral summer |
タイトル |
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言語 |
en |
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タイトル |
Interannual variability of surface bio-optical characteristics in the frontal zones of the Indian sector of the Southern Ocean during austral summer |
言語 |
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言語 |
eng |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
CDOM remineralisation |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Phytoplankton absorption |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Package effect |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Ocean colour |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Southern Ocean |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
アクセス権 |
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アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
著者 |
Pandi, Sudarsana Rao
Tripathy, Sarat C.
Shaju, S.S.
Minu, P.
Kerkar, Anvita U.
Bajish, C.C.
Anilkumar, N.
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抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Surface bio-optical constituents (Chl-a, light-absorption coefficient of phytoplankton (aph (443)), detritus (ad(443)), coloured dissolved organic matter (aCDOM(443))), and hydrographic variables were studied across the fronts along 57.5°E during 2011, 2013 and 2015 in the Indian sector of Southern Ocean to understand their interannual variability and phytoplankton pigment package effect. Latitudinal increases of Chl-a, aph(443), and aCDOM(443) were observed in 2011 and 2013. Mean Chl-a was higher in 2013 than in 2015 and 2011. The Chl-a specific absorption (a*ph(443)) latitudinally decreased implying ‘pigment package effect’ with increasing latitude. Interannually increase of aph blue (443)/red (675) ratio suggested higher non-photosynthetic absorption during 2013 and 2015 than in 2011. The relative contributions of bio-optical constituents to total absorption (at) showed interannual decrease in aph(443) and increase in aCDOM(443) and ad(443) inferring phytoplankton growth and decay phases. The robust aph(443)-Chl-a relationship during 2011 was used to derive aph(443) for other years, which holds good for in situ and satellite-derived counterparts. aCDOM(443) positively correlated with Chl-a and negatively with CDOM-spectral slope (S300-500), suggesting autochthonous sources. Satellite-retrieved Chl-a, aph(443) showed significant correlation (p < 0.001) with in situ data. This study provides baseline bio-optical data for understanding phytoplankton size-class, and improvement of bio-optical algorithms in this relatively inaccessible polar region. |
書誌情報 |
en : Polar Science
巻 36,
p. 100944,
発行日 2023-06
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ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
18739652 |
DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1016/j.polar.2023.100944 |
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関連名称 |
10.1016/j.polar.2023.100944 |